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If you’d like to use HDR techniques for your mobile photographs you’ve got choices. Moving from simple and limited to more complex and robust, consider these three: first, the iPhone Camera app’s built in HDR function; second, the app Pro HDR; and third the app TrueHDR. I use all three, moving from one to another as the contrast of the scene increases.

The strength of HDR renderings and the artifacts they tend to produce can be varied to suit individual tastes. Regardless of whether you favor a light touch or a heavy hand, if you photograph, with or without a smart phone, sooner or later you’ll need HDR. It’s an essential technique …

How many times have you wished you could quickly straighten lines in an image that have been distorted by perspective? Being able to control perspective is particularly important for architectural photography and it can be used to make stronger compositions in all images.

How many times have you wished you could control the aspect ratio of an image? Making an image more horizontal, square, or vertical or changing an image from one to another can be a powerful tool for creating more expressive images.

When you want to make a mobile phone image smaller quickly, launch iResize. Why would you want to change the size of an image? There are so many reasons; to email it, to post it online, and/or to share it in social networks are just a few. And with smart phone images growing in size every year, the need to do this is only increasing.

iResize can also change the proportion of an image from horizontal to panoramic, square, or even vertical.

iResize is one of those apps that you can learn instantly and is so easy to use that you’ll quickly overlook how often you use it, which is exactly what makes a go to app.

The iPhone app Touch Retouch performs the kind of stunning magic that first appeared in Adobe Photoshop only a few years ago. Adobe introduced this type of instant retouching based on pattern recognition under the name of Content Aware Fill. Now a similar technology is available for smartphone photography. You can also use the Clone Stamp tool to copy specific information from one part of an image to another, either to cover over an unwanted element or duplicate it.

With a little practice, you’ll start seeing photographs that you once might have ignored or passed by because of minor imperfections, which can now be convincingly removed in instants with the tap of your fingers. (It’s great for filling in the gaps in panoramic stitches too.)

You can use the app Liquid Scale to distort the frame of an image without distorting key elements in it. Like Adobe Photoshop’s Content Aware Scale, this software identifies image elements that are most likely to be more important than others and distorts other areas, typically areas that are smooth or randomly textured. There are limits to how far you can go before less distorted image elements begin to look unnatural, which are largely image dependent. In some cases, you can go so far as to convincingly turn a vertical image into a horizontal image. It’s magic.

This app will do more than change your images, it will change the way you see.

As far as magic moments go, few can compare to those fleeting moments when light streams from the heavens or wraps around objects, as if making visible some some divine presence. Kings and priests would pay dearly for the ability to place such signs at their command. You can have it for the simple price of an app.

Rays identifies highlights within an image and uses them as sources to render rays of light from …